asked Her Majesty's Government:

Whether they will publish figures showing the number of sudden spot checks carried out by security and immigration personnel on entrants through United Kingdom airports in the past six months, as a proportion of total entrants; how many of these were checks carried out as soon as the passenger had left the aeroplane; and how many were carried out after the normal checks applicable to all passengers. [HL1184]

The information is not held centrally and can be obtained only at disproportionate cost.